An LC-Based Tunable Low-Isolation Device for Adaptive Duplexers

Summary, in English

An LTE-enabled smartphone is a software-defined radio system that must cover a large number of frequency bands with different duplex differences. A proposed adaptive wideband duplexer needs a circulator to create the required initial isolation. To replace this an LC-based tunable low-isolation device is presented in this paper, providing the required tuning range for LTE Band I, II, III and VII. The circuit is implemented in a 130nm Silicon-on-Insulator (SOI) process and provides an isolation exceeding 30dB at both transmit and receive frequencies of each specified LTE frequency band. The insertion loss from PA output to antenna port is below 2dB in LTE band I. The fabricated circuit occupies an area of 2.0mm×1.2mm.

• Author: Mohammadreza Pourakbar; Markus Törmänen; Michael Faulkner; Henrik Sjöland
• Department/s: Department of Electrical and Information Technology; ELLIIT: the Linköping-Lund initiative on IT and mobile communication
• Publishing year: 2013
• Language: English
• Pages: 1-4
• Publication/Series: [Host publication title missing]
• Links: http://dx.doi.org/10.1109/NORCHIP.2013.6702035
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Electrical Engineering, Electronic Engineering, Information Engineering
• Conference name: NORCHIP Conference, 2013
• Conference date: 2013-11-11 - 2013-11-12
• Conference place: Vilnius, Lithuania
• Status: Published
• Research group: Analog RF